Patent GB-1094805-A (GB)
Title: Apparatus for wrapping rolls
Inventor: PRAGER GEORGE JAMES
IPC: B65B25/14
Filed: 1965-01-27
Abstract: 1,094,805. Wrapping rolls of paper. BELOIT EASTERN CORPORATION. Jan. 27, 1965, No. 3569/65. Heading B8C. A machine for wrapping rolls of paper gauges the roll, chooses a roll of wrapping paper of the right width and cuts the requisite length of wrapping paper from it; it then applies the wrapper about the roll to be wrapped as this is driven, glues the leading and trailing ends of the wrapper together, and crimps the end of the wrapper against the end face of the roll. Gauging and feeding the rolls and applying the wrappers.-In the embodiment described rolls of wrapping paper 47-50 (Fig. 1) are positioned on a storage stand adjacent the feeding and shearing device 15, 16. Rolls of paper to be wrapped are carried into the apparatus on a conveyer 10 which can be tilted about its longitudinal axis to transfer the rolls on to a table 11. The roll then moves under gravity into the centring and measuring device 12. Here inwardly moving platens 64 measure the length of the roll, control the feed of the correct width of wrapping paper, and centre the roll with respect to the wrapping paper. The diameter of the roll is also gauged by a transducer (73) (Fig. 7, not shown) which controls the length of wrapping paper supplied. The roll is then pushed from the device 12 and rolls on to rotating rollers 93. The wrapper is fed from the feeding and shearing device 15 and 16 between endless conveyers to a conventional gluing station (91) (Fig. 4, not shown) where glue is sprayed on the leading and trailing edges of the wrapper. The wrapper is then fed into the nip between the rotating rollers 93 and the roll of paper so that the leading edge is adhered to the roll of paper. The roll of paper is rotated until the wrapper has completely encircled the roll and the trailing edge has been adhered to the outer surface of the wrapper. The rollers 93 are then tilted to force the roll on to the table 11 along which it rolls to a second pair of continuously rotating rollers 103. Air cushioned stops may brake the movement of the rolls. Applying inner end discs.-A pair of paper discs is inserted under the wrapper and against the flat ends of the roll by a suction plate 113 (Fig. 12, not shown). The plate (113) is moved into and out of the end of the wrapper by means of a piston rod (132), and the suction plate (113) and piston rod (132) are pivoted at a point (135) in order to tilt the suction plate 113 for the positioning of a disc thereon. The plate (113) has five radial fingers (120) of different lengths which enable the size of the plate (113) to be adjusted for different-sized discs for the rolls of paper. The fingers (120) can be moved into the inoperable position shown in dashed lines in Fig. 12 (not shown). After the disc has been positioned on the end of the roll, air under pressure may be blown through the suction apertures (125) to keep the disc against the end of the roll as the plate (113) is withdrawn. Crimping the wrapper and applying tape.- The end of the wrapper is folded over the disc by a crimping wheel 179 (Fig. 9) which is driven by a roller (118) (Fig. 2, not shown) contacting the surface of the roll of paper which is rotating under the influence of the rollers 103. The crimping wheel 179 (Figs. 9 and 10, not shown) is driven at a higher speed than the peripheral speed of the roll of paper. When the crimping has been completed tape is fed from the rolls (199) past gluing stations and then applied around the wrapped roll. Applying outer discs.-The roll is ejected from the wrapping station by an ejector shoe and rolls down the table 11 to a third pair of driven rollers 217. Here a pair of glued discs are applied over the ends of the crimped wrapper in a manner similar to the inside discs. The suction plates which apply the discs in this case may be heated to set the adhesive on the discs. A third band of tape 199 may also be applied to the centre of the roll at this station. Delivering the wrapped roll. Automatic control.-The wrapped roll moves to a weighing station (239) where the statistics of the wrapped roll may be printed on it, and the roll is removed from the machine by a conveyer (241). The entire operation may be controlled by a punch card or magnetic tape system which indicates the type of wrapper required (e.g. waterproof, asphalt), the number of layers of wrapper required, the type of inside and outside discs and the type of tape to be used. All this information may also be printed on the wrapped roll at the station 239.